Edwin t



(No Model.) 2 Sheets-Sheet l. E. T. GREENPIELD. MECHANISM FOR DRAWINGAND GOVBEING TUBES.

Patented Oct. 29, 1895.

. M J M M 'Q z (No Model.) 7 2 Sheets-Sheet 2.

3 T. GREENFIEL D. MEGHANISMEOR DRAWING AND COVERING TUBES.

Patented Oct. 29,1895.

UNITED STATES PATENT UFFIQEQ EDWIN T. GREENFIELD, OF NEW YORK, N. Y.

MECHANISM FOR DRAWING AND COVERING TUBES.

SPECIFICATION forming part of Letters Patent No. 548,637, dated October29, 1895.

Application filed December 1'7, 1394- Serial No. 532,119. (No model.)

To aZZ whom it may concern.-

Be it known that I, EDWIN T. GREENFIELD, a citizen of the United States,residing at New York, in the county of New York and State of New York,have made a new and useful invention in Mechanism for Drawing andCovering Tubes, of which the following is a specification.

My invention relates particularly to improvements in apparatus designedfor use in connection with mechanism for drawing and simultaneouslycovering paper or analogous tubes with a coating of metal in accordancewith the method of operation described and claimed in a prior patentgranted to me on the 23d day of February, 1892, and numbered 469,662,and will be fully understood by referring to the accompanying drawings,in which-- Figures 1 and 2 are respectively side elevational and planview illustrating my improved apparatus complete and as used in thepractice of the method of covering tubes with metal, as described andclaimed in the aforesaid patent. Fig. 3 is a transverse sect-ional viewtaken on the broken line 3 3, Fig. 1, and as seen looking at that figureof the drawings from the left toward the right in the direction of thearrows thereon. Fig. 4 is a perspective view of one of the movablegripping-jaws together with its pivotal connections to one of the linksof the sprocketchain which carries said jaws and with friction-rollsjournaled thereon; and Fig. 5 is a transverse sectional view takenthrough Fig. 4.

In the practice of the method of covering tubes with metal, as disclosedin my prior patent above referred to, use is made of a gripping devicewhich grips the covered tube and draws it forward a definite length andis again restored to the starting-point 16, thus making the process ofdrawing intermittent.

It was with a view of continuously drawing and simultaneously coveringtubes with metal that the present invention was devised, thereby greatlyincreasing the capacity of the entire apparatus, as will be fullyunderstood in connection with the description of the mechanism whichwill now be referred to in detail, all like letters of referencewherever used in all of the figures of the drawings rep resenting likeparts.

F represents the frame of the machine, which is preferably of metal, andis sustained upon legs or standards which may be bolted or secured tothe floor in any -well-known manner.

D represents the covering-die, similar in all respects to that disclosedin my prior patent above referred to, i being the tube to be covered andm the sheet or strip of metal as it is drawn into the die, 15representing the metalcovered tube as it passes out of the die.

S S and S S are two pairs of sprocketwheels journaled upon shafts s sand s s in the body of the frame.

G and G are gear-wheels meshing with each other and carried,respectively, by the shafts s and s.

P is a driving-pinion meshing with the gear-wheel G and carried by ashaft 19, journaled also in the frame F, and P is a bandpulley adaptedto be connected by a belt in the usual manner to any constant source ofdriven power, as a steam-engine, electric motor, or the like.

O C constitute the successive links of two sprocketchains, the former ofwhich is carried by the sprocket-wheels S and S while the latter iscarried by the sprocket-wheels S and S J and J are grippi'ngjaws carriedby alternate links of the sprocket-chains C and C, said jaws being eachpivotally secured to one of the links by trunnions r 7', side lugs orears 0 c, and transverse pins 0 0 (See Figs.

4 and 5.) a

R. and R are friction-rolls journaled upon the trunnions r r and held inplace thereon by washers w w, secured to the outer ends of the trunnions1' 'r by screws 1" 0". (See Fig. 5).

T T are rigid or fixed tracks on the inner faces of the framelocated ina plane parallel with the axis of the tubett', which is to be drawn andcovered, and T T are corresponding tracks parallel thereto and integralwith a head-block, adj ustably secured and having vertical slidingmovement between the sides of the frame through the agency of ascrewbolt 71 and set-nut n, the head of said screwbolt having a bearingon the under surface of a strong curved steel spring B, the oppositeends of which spring are detachably secured through the agency of hookedends beneath cross bars or rodsb b, pivotally secured to the sides ofthe frame by bolts B B, (see Figs. 1 and 2,) the arrangement being suchthat the tracks T T may be removed or adjusted, as to their verticalheight, at will, thereby regulating the pressure upon the gripping-jawsJ J. Between these tracksT T and T T the gripping-jaws J are adapted toadvance, while the friction-rolls R R simultaneously roll upon saidtracks in opposite directions as they are thus advanced, as will bedescribed more particularly in connection with thedescription of themode of operation.

9 is a metallic arch secured to the frame above the yielding spring B"by screws and acting as a sliding surface for the under side of theupper sprocket-chain, as clearly shown in Fig. 1.

d and d are protecting-hoods secured to the frame by lateral extensionsand bolts d cl and having an opening between them through whichthemetal-covered tube 25 15 passes as it is drawn forward, the upperhood d being additionally secured to the frame by a yoke 70, as clearlyshown in Figs. 1. and 2.

The operation of the apparatus is as follows: A short section of thetube t having been drawn through the die Dand the metallic covering tencased thereon in the manner described in my prior patent, so that saidcompleted section will be gripped between the first pair ofgripping-jaws J J and the necessary tension having been put upon themovable tracks T T by the set-nut and bolt n and 7t and strong fiatspring B, the machine is put in motion through the agency of the pulleyPand any source of driven power, so that the gear-wheels G G rotate inthe direction of the arrows, as shown in Fig. 1. Under this condition ofaffairs the sprocketwheels S S and S S cause the sprocketchains toadvance and the gripping-jaws JJ to successively grip and move thecovered tube t forward in the direction of the straight arrow on theleft of the drawings, the necessary gripping action being attained bythe agencyof the friction-rolls R R as they pass between the two pairsof tracks T T. It is apparent, therefore, that as the sprocket-chainscontinue to advance the gripping-jaws are caused to successively comeinto play and give to the covered tube t t continuous motion so long asthe power is continuously applied at the pulley P.

Although I have described my invention as having an especialadaptability to the covering of tubes with metal, I desire it understoodthat it has many uses in the arts and may have an application whereverit is desired to give continuous motion in one direction to a body to bemoved-as, for instance, in the drawing of sheet metal, the drawing ofwire, the tightening of telegraph and other line wires, the raising andlowering of the anchors of vessels, the paying out or drawing in ofcables in the laying of ocean-cables, or, in fact, anywhere in the artswhere such a device may have an analogous use-it only be ing necessaryto adapt the conformation of the faces of the gripping-jaws Jand J tosuit or adapt themselves to the material to be moved or drawn.

To make a single illustration in the application of the invention to thedrawing of sheet metal, the inner faces of the jaws J J should be planeor parallelsurfaces, while in the application of the same to the drawingof bodies having rectangular or other shapes it is obvious that theyshould be changed ac cordingly, and also that where the necessities ofthe case might demand it, as in the raising or lowering of cab1es,itmight be well to provide the inner surfaces of said jaws with teeth oranalogous frictional bearings. My claims, therefore, hereinafter madeare to be construed as covering the invention generically in all of itsuses.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-- 1. Mechanism forcontinuously imparting motion to a tube or analogous body consisting ofa series of gripping jaws pivotally connected directly to one or moresprocket chains geared to sprocket wheels having mechanical connectionwith a continuously acting source of power.

2. Mechanism for continuously drawing tube wire or like articles in thesame direction consisting of a series of pairs of gripping jawspivotally connected directly to and carried by two sprocket chains movedby pairs of sprocket wheels geared in turn to a continuously drivenmotor.

3. Mechanism for covering a tube or solid body with a coating or casingof sheet-metal, consisting of dies adapted to form from the sheet-metala tube with a lock-seam, in combination with continuously movinggripping mechanism consisting of jaws pivotally connected to one or moresprocket chains carried by sprocket wheels, which sprocket wheels inturn are connected to a stationary source of driven power, said jawsbeing so arranged as to successively grip and give to the tube and itsmetallic covering continuous forward motion.

4. Mechanism for continuously drawing tube wire or analogous articles inthe same direction consisting of two series of gripping jaws pivotallyconnected directly to and carried by sprocket chains and adapted to bemoved by sprocket wheels geared to a source of motive power, incombination with means for varying the gripping relations between thejaws.

5. Mechanism for continuously drawing tube wire or analogous articles inthe same direction consisting of gripping jaws pivotally secured tosprocket chains carried each byapair of sprocket wheels geared toasource scribed my name this 5th day of December, of motive power, saidjaws being provided 1894.

each with friction rolls adapted to run be- EDWIN T. GREENFIELD. tweentracks, one pair of said tracks being 5 provided with means foradjusting them rela- Witnesses:

lively L0 the other pair. G. J. KINTNER,

In testimony whereof I have hereunto sub- GEO. F. TRUELL.

